NumCpp  2.12.1
A Templatized Header Only C++ Implementation of the Python NumPy Library
minimumFilter.hpp
Go to the documentation of this file.
1
28#pragma once
29
30#include "NumCpp/Core/Shape.hpp"
31#include "NumCpp/Core/Slice.hpp"
32#include "NumCpp/Core/Types.hpp"
34#include "NumCpp/NdArray.hpp"
35
36namespace nc::filter
37{
38 //============================================================================
39 // Method Description:
51 template<typename dtype>
53 uint32 inSize,
54 Boundary inBoundaryType = Boundary::REFLECT,
55 dtype inConstantValue = 0)
56 {
57 NdArray<dtype> arrayWithBoundary =
58 boundary::addBoundary2d(inImageArray, inBoundaryType, inSize, inConstantValue);
59 NdArray<dtype> output(inImageArray.shape());
60
61 const Shape inShape = inImageArray.shape();
62 const uint32 boundarySize = inSize / 2; // integer division
63 const uint32 endPointRow = boundarySize + inShape.rows;
64 const uint32 endPointCol = boundarySize + inShape.cols;
65
66 for (uint32 row = boundarySize; row < endPointRow; ++row)
67 {
68 for (uint32 col = boundarySize; col < endPointCol; ++col)
69 {
70 NdArray<dtype> window = arrayWithBoundary(Slice(row - boundarySize, row + boundarySize + 1),
71 Slice(col - boundarySize, col + boundarySize + 1));
72
73 output(row - boundarySize, col - boundarySize) = window.min().item();
74 }
75 }
76
77 return output;
78 }
79} // namespace nc::filter
Holds 1D and 2D arrays, the main work horse of the NumCpp library.
Definition: NdArrayCore.hpp:139
const Shape & shape() const noexcept
Definition: NdArrayCore.hpp:4511
value_type item() const
Definition: NdArrayCore.hpp:3022
self_type min(Axis inAxis=Axis::NONE) const
Definition: NdArrayCore.hpp:3085
A Shape Class for NdArrays.
Definition: Core/Shape.hpp:41
uint32 rows
Definition: Core/Shape.hpp:44
uint32 cols
Definition: Core/Shape.hpp:45
A Class for slicing into NdArrays.
Definition: Slice.hpp:45
NdArray< dtype > addBoundary2d(const NdArray< dtype > &inImage, Boundary inBoundaryType, uint32 inKernalSize, dtype inConstantValue=0)
Definition: addBoundary2d.hpp:56
Definition: addBoundary1d.hpp:44
NdArray< dtype > minimumFilter(const NdArray< dtype > &inImageArray, uint32 inSize, Boundary inBoundaryType=Boundary::REFLECT, dtype inConstantValue=0)
Definition: minimumFilter.hpp:52
Boundary
Boundary condition to apply to the image filter.
Definition: Boundary.hpp:36
std::uint32_t uint32
Definition: Types.hpp:40